Immunogenicity and Safety Study of Topical Recombinant Thrombin in Surgical Hemostasis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00491608
Recruitment Status : Completed
First Posted : June 26, 2007
Results First Posted : January 12, 2012
Last Update Posted : January 13, 2012
Information provided by (Responsible Party):

June 22, 2007
June 26, 2007
November 3, 2011
January 12, 2012
January 13, 2012
June 2007
July 2008   (Final data collection date for primary outcome measure)
Number of Participants With Anti-recombinant Thrombin (rThrombin) Product Antibodies at Day 29 in Participants With and Without Anti-bovine Thrombin Product Antibodies at Baseline [ Time Frame: At Day 29 ]
Seropositive=with specific anti-bovine thrombin product antibodies; seronegative=without specific anti-bovine thrombin product antibodies.
Incidence of anti-rhThrombin product antibodies [ Time Frame: 1 month ]
Complete list of historical versions of study NCT00491608 on Archive Site
  • Number of Participants With Death as Outcome, Serious Adverse Events, Treatment-related Adverse Events (AEs), and Treatment-emergent AEs [ Time Frame: Day 1 (surgery) to Day 29 (end of study), continuously ]
    AE=a new unfavorable symptom, sign, or disease or worsening of a preexisting condition that may or may not have a causal relationship with treatment. SAE=an unfavorable medical event that results in death, persistent or significant incapacity, or drug dependency or abuse; is life-threatening, or a congenital anomaly/birth defect; or requires or prolongs hospitalization. Treatment-related=possibly, probably, or certainly related to study drug. Treatment-emergent=onset on or after treatment start. Grade (Gr) 1=mild, Gr 2=moderate, Gr 3=severe, Gr 4=life threatening/disabling, Gr 5=death.
  • Number of Participants With Abnormal Hematology Laboratory Results of Common Terminology Criteria (CTC) Grade 2 or Higher at Baseline and Day 29 [ Time Frame: Baseline and Day 29 (end of study) ]
    Hemoglobin, low (g/L): Grade 2=<100 Grade 3=<80; Grade 4=<65. Platelets, low: Grade 2=<75*10^9/L; Grade 3=<50*10^9/L; Grade 4=<25*10^9/L. Leukocytes, low: Grade 2=<3.0-2.0*10^9/L; Grade 3=<2.0-1.0*10^9/L; Grade 4=<1.0*10^9/L. Lymphocytes, low: Grade 2=<0.8*10^9/L; Grade 3=<0.5*10^9/L; Grade 4=<0.2*10^9/L. Neutrophils, low: Grade 2=<1.5*10^9/L; Grade 3=<1.0*10^9/L; Grade 4=<0.5*10^9/L. Changes in hematocrit values observed were not graded for severity.
  • Number of Participants With Elevations in Coagulation Parameters of CTC Grade 3 or Higher at Baseline and Day 29 [ Time Frame: Baseline and Day 29 (end of study) ]
    Activated partial thromboplastin time (aPTT) elevations: Grade 3=>2*upper limit of normal (ULN). International normalized ratio(INR)elevations: Grade 3=>2*ULN. Changes in prothrombin time were not graded for toxicity. n=Number of participants with assessments available at that visit.
  • Number of Participants With Abnormal Laboratory Results in Median Levels of Immunoglobulin A, G, and M at Baseline or Day 29 [ Time Frame: Baseline and Day 29 (end of study) ]
    Abnormal laboratory findings were recorded as AEs when the investigator considered them to be clinically significant (eg, an unusual result for the surgical population or for an individual participant) or when they were associated with symptoms or required treatment or a change in patient management.
  • Number of Participants With Clinically Significant Changes in Mean Values for Vital Signs (Temperature, Systolic Blood Pressure, Diastolic Blood Pressure, Respiration Rate, Heart Rate) at Baseline and Day 29 [ Time Frame: Baseline and Day 29 (end of study) ]
    Laboratory findings considered clinically significant by investigator when associated with symptoms, required specific treatment, or required a change in participant management. Clinically significant changes in vital signs were reported as adverse events.
  • Incidence and severity of adverse events [ Time Frame: 1 month ]
  • Incidence and grade of laboratory abnormalities [ Time Frame: 1 month ]
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Immunogenicity and Safety Study of Topical Recombinant Thrombin in Surgical Hemostasis
A Phase 3b, Open-Label, Single-Group Immunogenicity and Safety Study of Topical Recombinant Thrombin (rThrombin) in Surgical Hemostasis
The purpose of this study is to evaluate the safety and immune system response to recombinant thrombin when used to control bleeding in spinal and vascular surgery.
This is a Phase 3b, open-label, single-group, multisite safety and immunogenicity study of recombinant thrombin (rThrombin) in participants who are at least 18 years of age and undergoing spinal or vascular surgery. Eligible participants will receive topical rThrombin during surgery and complete a 1-month follow-up visit.
Phase 3
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
  • Spinal Surgery
  • Vascular Surgery
Biological: rThrombin
1000 U/mL applied directly or in combination with absorbable gelatin sponge or powder
Experimental: 1
Intervention: Biological: rThrombin

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
July 2008
July 2008   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Currently undergoing cervical, thoracic, or lumbar discectomy; corpectomy, laminectomy, lateral or interbody fusion, including both anterior and posterior approaches (not including minimally invasive procedures; arterial reconstruction; peripheral artery bypass (PAB) grafting; or arteriovenous (AV) vascular access procedures
  • History of surgery with high likelihood of exposure to bovine thrombin within the past 3 years. Prior surgery must have been 1 of the following open procedures: open procedures involving the spine or cranium, PAB grafting, AV vascular access procedures, autologous skin grafting, or other surgical procedure accompanied by documented treatment with bovine thrombin
  • Age of 18 years or younger at time of informed consent
  • If female and of child-bearing potential: Negative pregnancy test result within 14 days prior to treatment
  • Use of a medically accepted form of contraception from the time of informed consent to completion of all follow-up study visits, if sexually active male or a sexually active female of childbearing potential
  • Signed IRB/independent ethics committee-approved informed consent document

Exclusion Criteria:

  • Currently undergoing procedures requiring cardiopulmonary bypass or involving the aortic arch
  • Known hypersensitivity to rThrombin or any of its components
  • Presence of medical, social, or psychosocial factors that, in the opinion of the investigator, could impact safety or compliance with study procedures
  • Breastfeeding
  • Receipt of treatment with any experimental agent within 30 days of study enrollment or treatment
Sexes Eligible for Study: All
18 Years and older   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
United States
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Study Director: Allan Alexander, MD, CPI ZymoGenetics
January 2012

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP